Dart for cleaning tubes



FIG. 1 is a front view of a dart for cleaning tubes showing our new design in accordance with one embodiment of the present invention;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is an upper left bottom perspective view thereof.

The broken line shown in the drawings are included for the purpose of illustrating portions of the dart that form no part of the claimed design. 

CLAIM The ornamental design for a dart for cleaning tubes, as shown and described. 